Stop motion mechanism for looms



y 25, 1953 w. P. BROCK ETAL. 2,639,734

STOP MOTION MECHANISM FOR LOOMS Filed June 1, 1951 2 Sheets-Sheet l 34 TI; 6 12 y 34 srn! MOT/0N STOP MOTION SOLENOID CONTACT s2 32 72TRINJ/FQRMER agar-5: 21 7e 7 LIN f/RCl/IT i INVENTORS Fl? 5 WILLIAM F.BROOK y czcn. NEAL 7 mod s84 Patented May 26, 1953 STOP MOTION MECHANISMFOR LOOMS William P. Brook and Cecil Neal, Lancaster, S. 0.,

assignors to The Springs Cotton Mills, a corporation of South Carolina.

Application June 1, 1951, Serial No. 229,334

4 Claims.

This invention relates to stop motion mechanisms for looms by whichoperation of a loom may be stopped automatically upon failure of eitherthe filling or of a warp end, and more particularly to an improved meansfor obtaining stop motion actuation upon filling failure and to a uniquearrangement by which this actuating means may be employed in conjunctionwith warp failure detecting and stop motion actuating means.

Generally described, the stop motion mechanism of the present inventioncomprises a filling failure detecting means, a warp failure detestingmeans, a knock-off dog for each of these detecting means, and a commonmounting on which these knock-off dogs are carried for independentoperation upon actuation selectively or concurrently in response tofilling and warp failures. The filling failure detecting means isarranged to particular advantage according to the present invention forstop motion actuation by electrical means in response to the operationof a feeler fork motion.

These and other features of the present invention are described infurther detail below inv connection with the accompanying drawings, inwhich:

Fig. l is an end elevation of a loom frame with the relative dispositionof sufiicient operating elements indicated to illustrate the arrangementof a stop motion mechanism incorporating the present invention;

Fig. 2 is a plan view taken generally from the position 2--2 in Fig. lto illustrate the arrangement of the stand member employed accordingtothe present invention for the feeler fork slide;

Fig. 3 is an enlarged detail illustrating the mounting arrangement forthe stop motion knock-off dogs;

Fig. 4 is a plan View corresponding to Fig. 3; and

Fig. 5 is a schematic wiring diagram of the electrical circuit by whichthe stop motion mechanism is actuated according to the present inventionupon filling failure.

Referring now in detail to the drawings, and more particularly at firstto Fig. 1, a conventional form of loom frame is indicated by thereference numeral IE), with a lay for the loom, represented at, l2 andashipper lever atv M. The loom frame 2 I0 is also shown as being fittedwith a conven tional type of sliding bar warp failure detecting means orthe like, as at I 5, arranged in the usual manner with a flexibleplunger tube It for actuation of the stop motion mechanism as isexplained further below.

Also, a conventional form of feeler fork motion is indicated generallyat 29 arranged at the front of the loom frame It in relation to the layI2. This feeler fork motion 28 incorporates the common arrangement of afilling feeler fork 22 pivoted on the end of a slide 24 so that it isdisposed in relation to a grate (not shown) on the lay [2 for detectingfilling failure and for causing actuation of the slide 24 upon suchfilling failure. Actuation of the slide 24 results in moving itforwardly on the loom frame it in a stand member 26, and this forwardmovement of the slide 2t also causes. forward movement of a relatedelement 28 that is commonly referred toas a straddle bug through whichthe filling replenishing mechanism (not shown.) for the loom is commonlyactuated. According to the present invention, the stand member 28v forthis feeler fork motion 29 is modified to adapt it for electricalactuation of the stop motion mechanism upon filling failure as mentionedabove.

For this purpose, the stand member 26 is formed as shown best in Fig. 2with a lateral base portion 38 on which an electrical contact 32 iscarried. in a suitably insulated mounting. This.

lateral base portion 36 of the stand member 26 also carries a lever 34which is pivoted on the base portion 30, as at 3B, and is adapted, as bya lateralproj ection. 38, to make the el'ectricalcontact 32, althoughthis lever 35 with its lateral projection 38 is normally positioned inspaced relation from the contact 32 as by yieldable spring means or thelike at 4B. The lever 34 is further arranged on the stand member 26 sothat it is.

operated to make the contact 32 whenever the slide 24 of the feeler forkmotion 20- is actuated, this arrangement consisting in the embodimentillustrated in the drawings of the disposition of the extending end ofthe lever 31! in the path of forward movement of the straddle bug 28upon actuation of the slide 24 (compare Fig. 1), so that the. lateralprojection 38 on the. lever 34: is forced back. against the electricalcontact 32' by this motion of the straddle bug128.

When the electrical contact 32 is made in this manner upon fillingfailure, an electrical circuit (see Fig. is closed to actuate the stopmotion mechanism either selectively or concurrently with the previouslymentioned warp failure detecting means IS. The actual stop motionoperation is accomplished by knock-off dogs 42 and 44 arranged in acommon mounting 46 for independent operation, respectively, upon fillingfailure and warp failure. The common mounting 46 for the knock-off dogs42 and 44 consists of a bracket 48 adapted for attachment on the loomframe In and fitted With a pivot link 50 joining this bracket 48 to anend fitting 52 for a knock off rod 54 which extends to a connection withthe shipper lever I l and constitutes the means by which the shipperlever I4 is shifted to off" position upon operation of the stop motionmechanism.

The knock-off rod end fitting 52 serves as the direct mounting means forthe knock-off dogs 42 and 44 which are pivoted in this end fitting 52 onthe same pivot pin 56 by which the end fitting 52 is joined through thepivot link 50 to the mounting bracket 48 (see Figs. 3 and 4). The endfitting 52 is further formed to accommodate depressing springs 58 whichbear on the knockoff dogs 42 and 44 to maintain them normally inactiveat a retracted position within the end fitting 52. These springs 58,however, allow either or both of the knock-off dogs 42 and M to beraised in response to filling or warp failure so that their forward endsare disposed in the path of a bunter 6!] carried by the lay I2 andthrough which the backward movement of the lay I2 is transmitted to theknock-off rod 54 to shift the shipper lever M to off position wheneverthe stop motion mechanism is actuated.

Actuation of the stop motion mechanism upon warp failure is accomplishedthrough the previously mentioned flexible plunger tube I8, running fromthe warp failure detecting means It to the mounting bracket 13 forapplication to the bottom face of the knock-off dog A l in the usualmanner. Actuation of the stop motion mechanism upon filling failure, onthe other hand, is accomplished by means of the previously mentionedelectrical circuit which includes the contact 32 and a solenoid 62having an actuating arm 64 from which a connecting rod 65 runs to alateral pin 68 fitted in the knock-off dog 42 so that this dog 42 israised to active position whenever the solenoid 62 is energized.

The arrangement of this electrical circuit by which the solenoid 52 isenergized upon filling failure to operate the knock-off dog 62 in thismanner is illustrated schematically in Fig. 5, while its structuraldisposition on the loom frame I0 is indicated in Fig. 1. As shown, thecircuit comprises a line circuit It running to the loom through atransformer 12. From the transformer 12 a low voltage loom circuit istaken off, one leg 14 of which is grounded to the loom frame I0 and theother leg 76 of which runs to the solenoid E2 and should preferablyinclude a sprin biased switch 18 arranged to open the loom circuitwhenever the stop motion mechanism has been actuated to shift theshipper lever M to off position. The solenoid 62 is also connectedthrough a line 80 to the insulated electrical contact 32 on the standmember 26 so that whenever this contact 32 is made by the lever 34, theelectrical loom circuit is completed by grounding it to the loom frame I0 at this point too, and thereby energizing the solenoid 62.

A stop motion mechanism arranged according to the present invention asjust described above has the very important advantage of reducingsubstantially the number of operating parts and the complexity of theoperating mechanism as compared with loom stop motions heretoforecommonly in use, which advantage not only provides much more dependableservice, but also results in simplifying greatly the fixing attentionrequired and consequently reduces down time as well as maintenance andreplacement costs.

The present invention has been described in detail above for purposes ofillustration only and is not intended to be limited by this descriptionor otherwise except as defined in the appended claims.

We claim:

1. In a loom of the type incorporating a filling feeler fork and a slideon which said fork is pivoted, stop motion mechanism comprising a standmember for said slide, an electrical contact on said stand member andinsulated therefrom, a lever pivoted on said stand member for movementby said slide to make said contact but normally spaced from saidcontact, an electrical circuit including said contact, a knock-off dog,and means actuated by said electrical circuit for operating saidknock-off dog upon making of said contact.

2. In a loom of the type incorporating a filling feeler fork and a slideon which said fork is pivoted for causing actuation of said slide uponfilling failure, stop motion mechanism comprising a stand member forsaid slide, an electrical contact on said stand member and insulatedtherefrom, a lever pivoted on said stand member and normally positionedthereon in spaced relation from said contact but arranged for operationfrom said slide to make said contact whenever said slide is actuated, anelectrical loom circuit including said contact, a knock-off dog, andmean actuated by said electrical loom circuit for operating saidknock-off dog upon making of said contact.

3. In a loom having a warp failure detecting means and incorporating afilling feeler fork and a slide on which said fork is pivoted forcausing actuation of said slide upon detection of filling failure bysaid fork, stop motion mechanism comprising two knock-off dogs, a commonmounting means carrying said dogs for independent operation, actuatingmeans for operating one of said knock-ofi' dogs from said warp failurdetecting means upon warp failure, and means for operating the other ofsaid knock-off dogs upon detection of filling failure by said fillingfeeler fork, said last mentioned means comprising a stand member forsaid slide, an electrical contact on said stand member and insulatedtherefrom, a

lever pivoted on said stand member and adapted to make said contact,said lever being yieldably p0- sitioned on said stand member in spacedrelation from said contact and arranged for operation to make saidcontact whenever said slide is actuated, an electrical loom circuitincluding said contact, and means actuated by said electrical loomcircuit for operating said last mentioned knock-off dog upon making ofsaid contact.

4. In a loom having a warp failure detecting means and incorporating afilling feeler fork and a slide on which said fork is pivoted, stopmotion mechanism comprising: a first knock-ofi dog; means for actuatingsaid first dog from said warp failure detecting means; a secondknock-off dog;

means for actuating said second dog from said filling feeler fork andslide, said last mentioned means comprising a stand member for saidslide, an electrical contact on said stand member and insulatedtherefrom, a lever pivoted on said stand member for movement by saidslide to make said contact but normally spaced from said contact, anelectrical circuit including said contact, and means actuated by saidelectrical circuit for operating said knock-off dog upon making of saidcontact; and a common mounting means carrying said first and secondknock-off dogs for independent operation and thereby rendering said stopmotion mechanism responsive selectively or concurrently to warp andfilling failures.

WILLIAM P. BROCK.

CECIL NEAL.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,566,249 Hoeber Dec. 15, 1925 1,567,511 Johnson Dec. 29, 19252,378,895 Brown June 26, 1945

